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交直流混合电网的多智能体自律分散控制

电网技术 2017年第4期41卷 1158-1164页

作者：高扬艾芊郝然张昭丞 muhammad yousif 上海交通大学电子信息与电气工程学院上海市闵行区200240

针对交直流混合电网传统集中控制缺乏灵活性和鲁棒性的特点,以及分布式控制无法同时兼顾全局最优及响应速度等的不足,提出一种基于多智能体系统的交直流混合电网自律分散控制策略,即在多端直流的每个端子都设置一个智能体,构成多智能体... 详细信息

针对交直流混合电网传统集中控制缺乏灵活性和鲁棒性的特点,以及分布式控制无法同时兼顾全局最优及响应速度等的不足,提出一种基于多智能体系统的交直流混合电网自律分散控制策略,即在多端直流的每个端子都设置一个智能体,构成多智能体系统,每个智能体都包含两个功能模块:全局信息获取模块和自主决策模块。采用这种控制策略时,上层优化问题与传统的电网调度问题相近,下层系统通过智能体之间以及智能体与系统间的交互、协调,实现群体妥协解。在仅有邻居换流站电压、频率等状态信息基础上,基于多智能体一致性控制实现各端换流站间有功功率的合理分配,平抑负荷波动。最后通过PSCAD仿真搭建典型的交直流混合电网验证所提控制策略的有效性及优越性。

关键词：多智能体系统交直流混合多级系统自律分散一致性算法

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Genetic Diversity among Some Sheep Breeds in Sulaimani Governorate Using RAPD-PCR Technique

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Journal of Life Sciences 2013年第9期7卷 971-979页

作者： yousif muhammad Salih Al-Barzinj Muqdad Kamal Ali Animal Resource Department College of Agriculture University of Salahaddin Erbil 44001 Iraq Animal Production Department Faculty of Agriculture University of Sulamania Sulamania 334 lraq

RAPD （Random amplified polymorphic DNA） markers were used to study genetic diversity among three Kurdish sheep breeds （the Karadi, Hamdani and Jaff） with the Awassi sheep breed. A total of 40 samples were typed using twenty RAPD primers. Ten out of the twenty primers had clear bands, which used to investigate the genetic variations among breeds. One of the ten primers is monomorphism. A total of 109 bands were scored, of which 46 bands （46.56%） were polymorphic and 18 of polymorphic band were unique bands. For all breeds, Nei＇s gene diversity, Shannon index, percentage of polymorphic loci and unique bands are respectively in the range of 0.32 to 0.50, 0.44 to 0.69, 31.81 to 100, and 2 to 8. Using UPGMA （unweighted pair-group method with arithmetic average） dendrogram, the three clusters, the 1st cluster branch consisted of the Karadi sheep breed, the 2nd cluster was include both of the Jaff and Hamdani sheep breeds and the 3rd one included Awassi sheep breed. These results indicated that the Karadi sheep is most genetically distant from the Awassi sheep （0.916）. The Jaff and Hamdani sheep in the 2nd cluster indicate a close relationship between them and the results indicated that the Jaff and Hamdani sheep breeds were closer to Awassi sheep breed than to the Karadi sheep breed. The dendrograms show that there are high genetic distances among sheep breeds, and were ranged from 0.223 between Hamdani and Jaff sheep breeds to 0.916 between Karadi and Awassi sheep breeds. Based on the high degree of genetic distance among the four sheep breeds it is concluded that the four sheep breeds arc independent and isolated breeds.

关键词： RAPD-PCR Kurdish sheep breeds polymorphism genetic distance

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巴基斯坦市、县与乡级地区的发展均衡性研究

小城镇建设 2018年第11期36卷 56-65页

作者： muhammad yousif 张悦巴基斯坦迈赫兰工程技术大学城市与区域规划系清华大学建筑学院

巴基斯坦城区面临着平衡各地区社会经济与实体发展水平的巨大挑战。与一级城市相比,巴基斯坦的中小城市地区发展还非常落后。本研究旨在刻画巴基斯坦当前城镇的发展状况,以公共服务、基础设施及环境质量为三个基础指标,辅以人口、人均... 详细信息

巴基斯坦城区面临着平衡各地区社会经济与实体发展水平的巨大挑战。与一级城市相比,巴基斯坦的中小城市地区发展还非常落后。本研究旨在刻画巴基斯坦当前城镇的发展状况,以公共服务、基础设施及环境质量为三个基础指标,辅以人口、人均收入、医疗服务指标判断城市发展均衡性。根据巴基斯坦全国层面统计、规划与发展部门提供的量化数据,辅以巴基斯坦四省提供的数据,利用微软的统计软件进行数据分析。ArcGIS利用数据生成的空间图显示了巴基斯坦各城市间的城市发展均衡性。结果表明:巴基斯坦城镇化步伐迅速,多半大城市与一级城市地区都受到城镇化的影响。其次,二级城市的发展开始下滑。由于缺少适用的基础服务设施,人们纷纷迁移到一级城市周围的中小城镇。巴基斯坦政府应立即采取措施提升各城市地区的公共服务、基础设施与环境指标,使市(Metropolitan)、县(District)及乡(Tehsil)级城市地区间的社会经济与实体发展保持均衡。

关键词：城镇化城市发展社会经济行政等级发展均衡性巴基斯坦

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Optimizing Row Spacing to Ameliorate the Productivity of Spring Sugarcane (Saccharum officinarum L.)

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Agricultural Sciences 2016年第8期7卷 531-538页

作者： Sami Ullah Shakeel Ahmad Anjum muhammad Mohsin Raza Aamir Riaz Adeel Abbas Malik muhammad yousif Jinchuan Ma Yingxia Liu Jiajia Zhang Dingwen Cheng Yaxin Xu Iftikhar Ali Department of Agronomy University of Agriculture Faisalabad Faisalabad Pakistan Ministry of Agricultural Key Laboratory of Crop Nutrition and Fertilization Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China Arid Zone Research Institute Pakistan Agriculture Research Council Bahawalpur Pakistan Weed Science Laboratory Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing China College of Resource and Environment Jilin Agricultural University Changchun China

One of the main reasons behind reduced cane yield is pathetic method of planting. Planting method and row spacing are the most important yield contributing factors in sugarcane. A field experiment was carried out in order to determine quality and yield of sugarcane in various spatial arrangements. Treatments are 180 cm spaced trenches with triple row strips;180 cm spaced trenches with alternate row strips;120 cm spaced trenches with double row strips and 60 cm spaced furrow with single row. Perusal of data revealed that 3.6%, 13.4%, 15%, 15.3% more cane diameter (cm), cane length (cm), stripped cane yield (t·haˉ1), sugar yield (t·haˉ1) were obtained from 180 cm spaced trenches with triple row strips as compared to conventional planting method i.e. 60 cm spaced furrows. While the number of millable canes mˉ2, polarity %, cane juice purity %, cane juice %, commercial cane sugar % and cane sugar recovery % remained non-significant by different planting techniques.

关键词： Furrow Planting Quality Row Spacing Sugarcane Trench Planting Yield

Improving the Position Accuracy and Computational Efficiency of UAV Terrain Aided Navigation Using a Two-Stage Hybrid Fuzzy Particle Filtering Method

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Computers, Materials & Continua 2025年第1期82卷 1193-1210页

作者： Sofia Yousuf muhammad Bilal Kadri College of Engineering Karachi Institute of Economics&TechnologyKarachi75190Pakistan College of Computer and Information Sciences Prince Sultan UniversityRiyadh11586Saudi Arabia

Terrain Aided Navigation(TAN)technology has become increasingly important due to its effectiveness in environments where Global Positioning System(GPS)is *** recent years,TAN systems have been extensively researched for both aerial and underwater navigation ***,many TAN systems that rely on recursive Unmanned Aerial Vehicle(UAV)position estimation methods,such as Extended Kalman Filters(EKF),often face challenges with divergence and instability,particularly in highly non-linear *** address these issues,this paper proposes and investigates a hybrid two-stage TAN positioning system for UAVs that utilizes Particle *** enhance the system’s robustness against uncertainties caused by noise and to estimate additional system states,a Fuzzy Particle Filter(FPF)is employed in the first *** approach introduces a novel terrain composite feature that enables a fuzzy expert system to analyze terrain non-linearities and dynamically adjust the number of particles in *** design allows the UAV to be efficiently localized in GPS-denied environments while also reducing the computational complexity of the particle filter in real-time *** the second stage,an Error State Kalman Filter(ESKF)is implemented to estimate the UAV’s *** ESKF is chosen over the conventional EKF method because it is more suitable for non-linear *** results demonstrate that the proposed fuzzy-based terrain composite method achieves high positional accuracy while reducing computational time and memory usage.

关键词： Sensor fusion fuzzy logic particle filter composite feature terrain aided navigation

Single-cell and spatial omics:exploring hypothalamic heterogeneity

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Neural Regeneration Research 2025年第6期20卷 1525-1540页

作者： muhammad Junaid Eun Jeong Lee Su Bin Lim Department of Biochemistry&Molecular Biology Ajou University School of MedicineSuwonSouth Korea Department of Biomedical Sciences Graduate School of Ajou UniversitySuwonSouth Korea Department of Brain Science Ajou University School of MedicineSuwonSouth Korea

Elucidating the complex dynamic cellular organization in the hypothalamus is critical for understanding its role in coordinating fundamental body functions. Over the past decade, single-cell and spatial omics technologies have significantly evolved, overcoming initial technical challenges in capturing and analyzing individual cells. These high-throughput omics technologies now offer a remarkable opportunity to comprehend the complex spatiotemporal patterns of transcriptional diversity and cell-type characteristics across the entire hypothalamus. Current single-cell and single-nucleus RNA sequencing methods comprehensively quantify gene expression by exploring distinct phenotypes across various subregions of the hypothalamus. However, single-cell/single-nucleus RNA sequencing requires isolating the cell/nuclei from the tissue, potentially resulting in the loss of spatial information concerning neuronal networks. Spatial transcriptomics methods, by bypassing the cell dissociation, can elucidate the intricate spatial organization of neural networks through their imaging and sequencing technologies. In this review, we highlight the applicative value of single-cell and spatial transcriptomics in exploring the complex molecular-genetic diversity of hypothalamic cell types, driven by recent high-throughput achievements.

关键词： cellular diversity hypothalamus multi-omics single-cell transcriptomics spatial transcriptomics

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Modeling and Comprehensive Review of Signaling Storms in 3GPP-Based Mobile Broadband Networks:Causes,Solutions,and Countermeasures

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 123-153页

作者： muhammad Qasim Khan Fazal Malik Fahad Alturise Noor Rahman Department of Computer Science Iqra National UniversityPeshawar25000Pakistan Department of Cybersecurity College of ComputerQassim UniversityBuraydah52555Saudi Arabia Department of Computer Science and Engineering Al-Fayha CollegeAl Jubayl31961Saudi Arabia

Control signaling is mandatory for the operation and management of all types of communication networks,including the Third Generation Partnership Project(3GPP)mobile broadband ***,they consume important and scarce network resources such as bandwidth and processing *** have been several reports of these control signaling turning into signaling storms halting network operations and causing the respective Telecom companies big financial *** paper draws its motivation from such real network disaster incidents attributed to signaling *** this paper,we present a thorough survey of the causes,of the signaling storm problems in 3GPP-based mobile broadband networks and discuss in detail their possible solutions and *** provide relevant analytical models to help quantify the effect of the potential causes and benefits of their corresponding *** important contribution of this paper is the comparison of the possible causes and solutions/countermeasures,concerning their effect on several important network aspects such as architecture,additional signaling,fidelity,etc.,in the form of a *** paper presents an update and an extension of our earlier conference *** our knowledge,no similar survey study exists on the subject.

关键词： Signaling storm problems control signaling load analytical modeling 3GPP networks smart devices diameter signaling mobile broadband data access data traffic mobility management signaling network architecture 5G mobile communication

Comprehensive Review and Analysis on Facial Emotion Recognition:Performance Insights into Deep and Traditional Learning with Current Updates and Challenges

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Computers, Materials & Continua 2025年第1期82卷 41-72页

作者： Amjad Rehman muhammad Mujahid Alex Elyassih Bayan AlGhofaily Saeed Ali Omer Bahaj Artificial Intelligence&Data Analytics Lab College of Computer&Information SciencesPrince Sultan UniversityRiyadh11586Saudi Arabia MIS Department College of Business Administration Prince Sattam Bin Abdulaziz UniversityAlKharj11942Saudi Arabia

In computer vision and artificial intelligence,automatic facial expression-based emotion identification of humans has become a popular research and industry *** demonstrations and applications in several fields,including computer games,smart homes,expression analysis,gesture recognition,surveillance films,depression therapy,patientmonitoring,anxiety,and others,have brought attention to its significant academic and commercial *** study emphasizes research that has only employed facial images for face expression recognition(FER),because facial expressions are a basic way that people communicate meaning to each *** immense achievement of deep learning has resulted in a growing use of its much architecture to enhance *** review is on machine learning,deep learning,and hybrid methods’use of preprocessing,augmentation techniques,and feature extraction for temporal properties of successive frames of *** following section gives a brief summary of assessment criteria that are accessible to the public and then compares them with benchmark results the most trustworthy way to assess FER-related research topics *** this review,a brief synopsis of the subject matter may be beneficial for novices in the field of FER as well as seasoned scholars seeking fruitful avenues for further *** information conveys fundamental knowledge and provides a comprehensive understanding of the most recent state-of-the-art research.

关键词： Face emotion recognition deep learning hybrid learning CK+ facial images machine learning technological development

Regression analysis of squeezing-induced hybrid nanofluid flow in Darcy-Forchheimer porous medium

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 193-208页

作者： K.muhammad M.SARFRAZ Department of Humanities and Sciences School of Electrical Engineering and Computer Science National University of Sciences and Technology Department of Mathematics Quaid-i-Azam University

This article presents a mathematical model addressing a scenario involving a hybrid nanofluid flow between two infinite parallel plates. One plate remains stationary, while the other moves downward at a squeezing velocity. The space between these plates contains a Darcy-Forchheimer porous medium. A mixture of water-based fluid with gold(Au) and silicon dioxide(Si O2) nanoparticles is formulated. In contrast to the conventional Fourier's heat flux equation, this study employs the Cattaneo-Christov heat flux equation. A uniform magnetic field is applied perpendicular to the flow direction, invoking magnetohydrodynamic(MHD) effects. Further, the model accounts for Joule heating, which is the heat generated when an electric current passes through the fluid. The problem is solved via NDSolve in MATHEMATICA. Numerical and statistical analyses are conducted to provide insights into the behavior of the nanomaterials between the parallel plates with respect to the flow, energy transport, and skin *** findings of this study have potential applications in enhancing cooling systems and optimizing thermal management strategies. It is observed that the squeezing motion generates additional pressure gradients within the fluid, which enhances the flow rate but reduces the frictional drag. Consequently, the fluid is pushed more vigorously between the plates, increasing the flow velocity. As the fluid experiences higher flow rates due to the increased squeezing effect, it spends less time in the region between the plates. The thermal relaxation, however, abruptly changes the temperature, leading to a decrease in the temperature fluctuations.

关键词： Nanofluidics